Pilot construction



July 25, 1961 J, LANDGRAF ETAL 2,993,533

PILOT CONSTRUCTION Filed NOV. 6, 1957 3% a 4mm r d/M him M 123 i a Patented July 25., 1961 2,993,533 PILOT CONSTRUCTION Jacob T. Landgraf, Freeport, and Raymond W. Nelson, Arlington Heights, 11]., assignors to H. D. Hudson Manufacturing Company, Chicago, 111., a corporation of Minnesota Filed Nov. 6, 1957, Ser. No. 694,887 2 Claims. (Cl. 158-115) The present invention relates to a novel pilot construction or pilot light shielded and protected in such manner as to prevent or minimize the entry or accumulation of dust or other foreign matter into or about the orifice of a pilot light for a gas burner or heater of a gas burning brooder for poultry.

In the operation of gas burning brooders for poultry where the burner functions to heat and maintain a substantially uniform temperature within the enclosure, it is necessarily important to maintain the pilot burning not only to assure effective heating but should the pilot fail, the accumulation of gas could be disastrous. To protect against the extinguishment of the pilot light, it is highly important to prevent the entry or accumulation of dust or other foreign matter that collects within the brooder from entering in or about the pilot orifice.

It is, therefore, an important object of the present invention to provide a novel means and manner of protecting the orifice or gas jet of a pilot light for the burner or heater of a poultry brooder.

The present invention frnther comprehends a novel pilot assembly in which the gas jet and its orifice are most effectively shielded against the entry or an accumulation of dust or other foreign matter and thus assure continuous burning of the pilot light and operation of the brooder.

A further object of the present invention is the provision of a novel pilot assembly for the burner or heater of a brooder for poultry, including a novel bracket so constructed and arranged as to provide a novel mounting for a pilot spud and jet or discharge orifice and also a target for said pilot, and a novel hood or shield for enclosing and protecting the jet and its discharge orifice against an accumulation of dust or other matter capable of extinguishing the flame.

Further objects are to provide a construction of maximum simplicity, efficiency, economy and ease of assembly and operation, and such further objects, advantages and capabilities as will later more fully appear and are inherently possessed thereby.

The invention further resides in the construction, combination and arrangement of parts illustrated in the accompanying drawing, and while there is shown therein a preferred embodiment, it is to be understood that the same is susceptible of modification and change, and comprehends other details, arrangements of parts, features and constructions without departing from the spirit of the invention.

In the drawing:

FIGURE 1 is a plan view of a burner unit for heating a brooder and equipped with the novel pilot assembly.

FIG. 2 is a fragmentary enlarged view in side elevation of the novel pilot assembly and a portion of the burner or heater.

FIG. 3 is a fragmentary enlarged view in front elevation of the pilot assembly.

FIG. 4 is a fragmentary enlarged view in vertical cross section taken longitudinally through the pilot hood and bracket.

Referring more particularly to the disclosure in the drawing and to the novel illustrative embodiment of the pilot assembly for a gas burner such as employed in heating a poultry brooder, the gas burner head is designated by the reference character and shown provided with multiple gas outlets or apertures 11 communicating with the feed pipe 12 for supplying the burner with a gaseous fuel from an inlet pipe 13 together with air through the neck 14, the latter provided with the usual air adjusting means for supplying a requisite quantity of air to form the combustible mixture.

The novel pilot assembly comprises a metal bracket 15 mounted upon the burner head 10 by means of laterally projecting anchoring flanges 16 and 17 aflixed to an embossment 18 on the burner head by attaching bolts or the like 19. The bracket 15 is provided with an upstanding leg 21 having a tapped or threaded opening for receiving the threaded end 22 of a pilot spud 23, the spud 23 in turn receiving the threaded end 24 of a nut 25 connected to the end of a pilot tube 26 for supplying the gaseous fuel to a gas jet 27 threaded into the discharge end of the pilot spud 23 and provided with a discharge orifice.

A protective metal hood or shield 28 encompasses and provides with the bracket 15 a protective cover or enclosure for the gas jet 27 and its orifice. This hood or cover is mounted upon and aflixed to the bracket 15 with an edge flanged over the upstanding leg 21 of the bracket, and extends a substantial distance beyond the discharge orifice and end of the gas jet 27.

In each of the spaced substantially horizontally arranged portions 29 and 31 of the bracket 15 is provided an opening through which projects a pilot target 32 with the upper portion of this target disposed forwardly of and in spaced relation with the gas jet 27 and its hood or shield 28. At its lower end 33 this target is enlarged or of a greater diameter and intermediate the length of this enlarged end is provided with an external flange or collar 34 locating the target and limiting its upward projection in the portion 31 of the bracket. A set screw 35 adjustably mounted in a threaded or tapped opening in the depending leg 36 of the bracket 15 secures the target in fixed position.

From the above description and the disclosure in the drawing, it will be apparent that the present invention comprehends a novel pilot assembly in which the discharge orifice is effectively shielded in such manner as to prevent the entry or minimize the danger of accumulation of dust or other foreign matter that would tend to collect or clog the discharge orifice and extinguish the flame of the pilot light.

Having thus disclosed the invention, we claim:

1. A pilot assembly for a burner for heating a gas burning brooder, comprising a bracket having an upstanding part provided with laterally projecting flanges affixed to and supported upon the burner; vertically spaced and substantially horizontally arranged portions projecting outwardly from the upper and lower ends of said upstanding part with the outer end of the upper of said portions having an upstanding leg, a pilot spud mounted in and projecting through said upstanding leg and provided with a gas jet having a discharge orifice directed toward but spaced from said burner, said vertically spaced and horizontally arranged portions having aligned openings therein, a hood mounted at one end upon said leg and provided with depending sides projecting downwardly alongside the upper of said portions to provide therewith an enclosure for said discharge orifice, a target projecting upwardly through said openings and positioned beyond said hood and between said discharge orifice and the burner, and means for anchoring said target in said operative position.

2. A pilot construction for supplying a pilot flame for heating a gas burning poultry brooder, comprising a supporting bracket having vertically spaced and substantially horizontally disposed portions provided with a depending connecting part at its inner end, laterally projecting flanges on said depending part for supporting said bracket, an upstanding leg at the outer end of said upper horizontal 3 4 portion, a pilot spud mounted in and projecting through References Cited in the file of this patent said upstanding leg and provided at its forward end with a discharge orifice vertically spaced from and above said UNITED STATES PATENTS horizontal portions of the bracket, a hood mounted at 1,876,495 Gioe Sept. 6, 1932 one end on said upstanding leg and extending forwardly 5 2,267,742 Mantz Dec. 30, 1941 therefrom to form with the leg' and upper horizontal por- 2,859,263 Glickman Nov. 4, 1958 tion an open-ended enclosure surrounding said pilot spud and extending therebeyond, said vertically spaced por- FOREIGN PATENTS tions having aligned openings therein, a target projecting 494,216 Great Britain Oct. 21, 1938 through said openings and positioned beyond said hood, 10 V and means for anchoring said target Within said openings. 

